Belinda may choose one of two options for the method in which she may be awarded a money prize. OPTION A: Spin a spinner twice. The spinner is divided into four equally-sized sectors numbered 1, 3, 4, and 5. If the sum of the two spins is greater than 6, Belinda is awarded $8. Otherwise, she must pay $2. OPTION B: Flip a coin three times. If heads appears twice, Belinda is awarded $10. Otherwise, she must pay $2. Belinda chooses the option with the greater mathematical expectation. How much more money can Belinda expect to make by choosing this option over the other option?